[Solved] Quickest way to compare two generic lists C# [closed]

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It sounds like you’re trying to verify that all items in list2 are contained within at least one item in list1. If that’s the case, this should do the trick:

bool list1ContainsList2Items = list2.All(l2 => list1.Any(l1 => l1.Contains(l2)));

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solved Quickest way to compare two generic lists C# [closed]